Release candidate

[Alrighttt]

To do:

• incorporate and security review types: Switch to fixed-length PolicyHash preimage SiaFoundation/core#207 ref

• implement methods in V2TransactionBuilder for atomic swap signing. Requires impl SatisfyPolicy for AtomicSwap ref

• Generic error handling in the dispatcher. Current error handling still has remnants of now refactored dispatcher. ref

• Move the example client to a rust doc example

• Wrap all relevant unit tests with cross_target_tests example

• Migrate docker test framework from Komodo DeFi Framework into Sia Rust. There are tests throughout the codebase that rely on a hardcoded URL to a walletd index node. Remove these in favor of mocked API or walletd docker containers.

• Implement the remaining file contract related types for V2Transaction. This is not critical for final delivery as we can safely ignore this data in deserialization and will never do serialization. At a minimum, replace todo!()s with error handling or empty data. ref1 ref2

[mariocynicys]

Grabbed task 6: Migrate docker test framework from Komodo DeFi Framework into Sia Rust. There are tests throughout the codebase that rely on a hardcoded URL to a walletd index node. Remove these in favor of mocked API or walletd docker containers.